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Noise control of jumbo-mounted percussive drills.

Authors
Bartholomae-RC; Bender-EK; Dixon-NR; Rubin-MN
Source
Noise Control Eng 1980 Nov; 15(3):128-137
NIOSHTIC No.
10000075
Abstract
The authors show how drill noise was attenuated 13 to 18 dB(A) with no loss in drilling rate. Long-term reliability is currently being evaluated through in-mine-testing. In controlled laboratory tests, the prototype jumbo drill noise control treatment has achieved a 19 dB(A) reduction in the radiated sound power level, with no significant reduction in the drilling rate. Field tests (underground as well as on the surface) have indicated that the treatment is capable of providing a 13 to 18 dB reduction in the A-weighted sound level, measured at the operator's position, under actual drilling conditions. While these tests are not complete, the preliminary results are encouraging in that the treatment is not prone to excessive exhaust icing, docs not materially degrade drilling performance, and is durable.
Keywords
Mining-industry; Mining-equipment; Noise-control; Noise-sources; Impact-noise; Engineering-controls; Control-technology
CODEN
NCEGAR
Publication Date
19801101
Document Type
OP; Journal Article
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
Contract-H0366024
Issue of Publication
3
ISSN
0093-9978
NIOSH Division
PRC
Source Name
Noise Control Engineering
State
MA; PA
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